public PDFSigner(string input, string output, Cert cert, MetaData md)
{
this.inputPDF = input;
this.outputPDF = output;
this.myCert = cert;
this.metadata = md;
}
private void signWorker_DoWork(object sender, DoWorkEventArgs e)
{
Cert myCert = null;
string certName = null;
string tsaUrl = "http://timestamp.globalsign.com/scripts/timestamp.dll"; // null if unused
X509Certificate2 certificateData = certificates[certificateComboSelectedIndex] as X509Certificate2;
if (certificateData != null)
{
certName = ExtractDNField(certificateData.Subject, "CN");
if (certName == null)
{
certName = certificateData.Subject; // Use fallback
}
byte[] bytes = certificateData.Export(X509ContentType.Pfx, "");
myCert = new Cert(bytes, "", tsaUrl, "" /* TSA login */, "" /* TSA password */);
}
else
{
return;
//myCert = new Cert(certificateTextBox.Text, certificatePwdBox.Text, tsaUrl, tsaLogin.Text, tsaPwd.Text);
}
if (reasonComboText == null)
{
reasonComboText = "";
}
// Copy original to backup file, then sign that back to original file name
string outputFile;
bool outputFileIsTemporary = false;
outputFile = Path.GetFileNameWithoutExtension(inputFileTextText) +
".unsigned" +
Path.GetExtension(inputFileTextText);
outputFile = Path.Combine(Path.GetDirectoryName(inputFileTextText),
outputFile);
string inputFile = outputFile;
// Create a copy if it does not exist yet (keep original unsigned forever)
if (!File.Exists(outputFile))
{
File.Copy(inputFileTextText, outputFile);
outputFile = inputFileTextText;
}
else
{
// We need a different temporary file
inputFile = inputFileTextText;
outputFile = Path.GetTempFileName();
outputFileIsTemporary = true;
}
// NOTES:
// * Encryption can only be applied before any signatures exist, otherwise existing signatures are broken.
// * Encryption requires a non-empty password set, or we'll get problems when opening next time.
// * Permissions can only be set together with the encryption status.
// => Permissions cannot be changed once a signature exists.
// http://stackoverflow.com/q/20008256/143684
// TODO
PDFEncryption pdfEnc = new PDFEncryption();
pdfEnc.UserPwd = "";
//pdfEnc.OwnerPwd = "1234";
pdfEnc.OwnerPwd = "";
pdfEnc.Encryption = true; // Use 128 bit instead of 40 bit, but still RC4
// Permissions explanation: http://www.pdflib.com/knowledge-base/pdf-security/permissions/
pdfEnc.Permissions.Add(permissionType.Copy);
pdfEnc.Permissions.Add(permissionType.DegradedPrinting);
pdfEnc.Permissions.Add(permissionType.Printing);
pdfEnc.Permissions.Add(permissionType.ScreenReaders);
//pdfEnc.Permissions.Add(permissionType.Assembly);
pdfEnc.Permissions.Add(permissionType.FillIn); // Includes signing
//pdfEnc.Permissions.Add(permissionType.ModifyAnnotation);
//pdfEnc.Permissions.Add(permissionType.ModifyContent);
// Sign document
PDFSigner pdfs = new PDFSigner(inputFile, outputFile, myCert, metaData);
PDFSignatureAP sigAp = new PDFSignatureAP();
sigAp.SigReason = reasonComboText;
sigAp.SigContact = "";
sigAp.SigLocation = "";
sigAp.Visible = visibleSignatureCheckChecked;
sigAp.Multi = existingSignatures;
sigAp.Page = pageNumValue;
sigAp.CustomText = "";
if (visibleSignatureCheckChecked)
{
if (showName)
{
if (showLabels)
{
sigAp.CustomText += "Digital signiert von ";
}
sigAp.CustomText += certName + "\n";
}
if (showLocation)
{
string country = ExtractDNField(certificateData.Subject, "C");
string locality = ExtractDNField(certificateData.Subject, "L");
if (!string.IsNullOrEmpty(country) || !string.IsNullOrEmpty(locality))
{
if (showLabels)
{
sigAp.CustomText += "Ort: ";
}
sigAp.CustomText += locality +
(!string.IsNullOrEmpty(locality) && !string.IsNullOrEmpty(country) ? ", " : "") +
country + "\n";
}
}
if (showReason)
{
if (showLabels)
{
sigAp.CustomText += "Grund: ";
}
sigAp.CustomText += reasonComboText + "\n";
}
if (showDate)
{
if (showLabels)
{
sigAp.CustomText += "Datum: ";
}
sigAp.CustomText += DateTimeOffset.Now.ToString("yyyy-MM-dd HH:mm:ss K") + "\n";
}
sigAp.CustomText = sigAp.CustomText.TrimEnd();
if (showImage && signaturePictureImage != null)
{
using (MemoryStream ms = new MemoryStream())
{
signaturePictureImage.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
sigAp.RawData = ms.ToArray();
}
}
sigAp.SigX = mm2pt(leftNumValue);
sigAp.SigY = mm2pt(bottomNumValue);
sigAp.SigW = mm2pt(widthNumValue);
sigAp.SigH = mm2pt(heightNumValue);
}
// Encrypt only if no signatures exist. Later it won't work anymore because it'll
// break the existing signatures.
pdfs.Sign(sigAp, false /*!existingSignatures*/, pdfEnc);
if (outputFileIsTemporary)
{
// Delete input file and replace with temp output
File.Delete(inputFile);
File.Move(outputFile, inputFile);
}
}
public PDFSigner(string input, string output, Cert cert)
{
this.inputPDF = input;
this.outputPDF = output;
this.myCert = cert;
}
private void signWorker_DoWork(object sender, DoWorkEventArgs e)
{
Cert myCert = null;
string certName = null;
string tsaUrl = "http://timestamp.globalsign.com/scripts/timestamp.dll"; // null if unused
X509Certificate2 certificateData = certificates[certificateComboSelectedIndex] as X509Certificate2;
if (certificateData != null)
{
certName = ExtractDNField(certificateData.Subject, "CN");
if (certName == null)
{
certName = certificateData.Subject; // Use fallback
}
byte[] bytes = certificateData.Export(X509ContentType.Pfx, "");
myCert = new Cert(bytes, "", tsaUrl, "" /* TSA login */, "" /* TSA password */);
}
else
{
return;
//myCert = new Cert(certificateTextBox.Text, certificatePwdBox.Text, tsaUrl, tsaLogin.Text, tsaPwd.Text);
}
if (reasonComboText == null)
{
reasonComboText = "";
}
// Copy original to backup file, then sign that back to original file name
string outputFile;
bool outputFileIsTemporary = false;
outputFile = Path.GetFileNameWithoutExtension(inputFileTextText) +
".unsigned" +
Path.GetExtension(inputFileTextText);
outputFile = Path.Combine(Path.GetDirectoryName(inputFileTextText),
outputFile);
string inputFile = outputFile;
// Create a copy if it does not exist yet (keep original unsigned forever)
if (!File.Exists(outputFile))
{
File.Copy(inputFileTextText, outputFile);
outputFile = inputFileTextText;
}
else
{
// We need a different temporary file
inputFile = inputFileTextText;
outputFile = Path.GetTempFileName();
outputFileIsTemporary = true;
}
// NOTES:
// * Encryption can only be applied before any signatures exist, otherwise existing signatures are broken.
// * Encryption requires a non-empty password set, or we'll get problems when opening next time.
// * Permissions can only be set together with the encryption status.
// => Permissions cannot be changed once a signature exists.
// http://stackoverflow.com/q/20008256/143684
// TODO
PDFEncryption pdfEnc = new PDFEncryption();
pdfEnc.UserPwd = "";
//pdfEnc.OwnerPwd = "1234";
pdfEnc.OwnerPwd = "";
pdfEnc.Encryption = true; // Use 128 bit instead of 40 bit, but still RC4
// Permissions explanation: http://www.pdflib.com/knowledge-base/pdf-security/permissions/
pdfEnc.Permissions.Add(permissionType.Copy);
pdfEnc.Permissions.Add(permissionType.DegradedPrinting);
pdfEnc.Permissions.Add(permissionType.Printing);
pdfEnc.Permissions.Add(permissionType.ScreenReaders);
//pdfEnc.Permissions.Add(permissionType.Assembly);
pdfEnc.Permissions.Add(permissionType.FillIn); // Includes signing
//pdfEnc.Permissions.Add(permissionType.ModifyAnnotation);
//pdfEnc.Permissions.Add(permissionType.ModifyContent);
// Sign document
PDFSigner pdfs = new PDFSigner(inputFile, outputFile, myCert, metaData);
PDFSignatureAP sigAp = new PDFSignatureAP();
sigAp.SigReason = reasonComboText;
sigAp.SigContact = "";
sigAp.SigLocation = "";
sigAp.Visible = visibleSignatureCheckChecked;
sigAp.Multi = existingSignatures;
sigAp.Page = pageNumValue;
sigAp.CustomText = "";
if (visibleSignatureCheckChecked)
{
if (showName)
{
if (showLabels)
{
sigAp.CustomText += "Digital signiert von ";
}
sigAp.CustomText += certName + "\n";
}
if (showLocation)
{
string country = ExtractDNField(certificateData.Subject, "C");
string locality = ExtractDNField(certificateData.Subject, "L");
if (!string.IsNullOrEmpty(country) || !string.IsNullOrEmpty(locality))
{
if (showLabels)
{
sigAp.CustomText += "Ort: ";
}
sigAp.CustomText += locality +
(!string.IsNullOrEmpty(locality) && !string.IsNullOrEmpty(country) ? ", " : "") +
country + "\n";
}
}
if (showReason)
{
if (showLabels)
{
sigAp.CustomText += "Grund: ";
}
sigAp.CustomText += reasonComboText + "\n";
}
if (showDate)
{
if (showLabels)
{
sigAp.CustomText += "Datum: ";
}
sigAp.CustomText += DateTimeOffset.Now.ToString("yyyy-MM-dd HH:mm:ss K") + "\n";
}
sigAp.CustomText = sigAp.CustomText.TrimEnd();
if (showImage && signaturePictureImage != null)
{
using (MemoryStream ms = new MemoryStream())
{
signaturePictureImage.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
sigAp.RawData = ms.ToArray();
}
}
sigAp.SigX = mm2pt(leftNumValue);
sigAp.SigY = mm2pt(bottomNumValue);
sigAp.SigW = mm2pt(widthNumValue);
sigAp.SigH = mm2pt(heightNumValue);
}
// Encrypt only if no signatures exist. Later it won't work anymore because it'll
// break the existing signatures.
pdfs.Sign(sigAp, false /*!existingSignatures*/, pdfEnc);
if (outputFileIsTemporary)
{
// Delete input file and replace with temp output
File.Delete(inputFile);
File.Move(outputFile, inputFile);
}
}
